STACK STRUCTURE FOR MULTILAYER TYPE SOLID OXIDE FUEL CELL, MULTILAYER TYPE SOLID OXIDE FUEL CELL, AND METHOD OF MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a multilayer type Solid Oxide Fuel Cell(SOFC) having a stack structure which allows the mechanical strength of SOFC to be secured on the whole not depending on the mechanical strength of a unit cell.

SOLUTION: A stack structure 40 comprises: a plurality of unit cells 2 stacked on one another and each having a solid electrolyte 4, a fuel electrode layer including a fuel electrode 7, and an air electrode layer including an air electrode 9 opposed to the fuel electrode layer with the solid electrolyte sandwiched therebetween; a separator 14 interposed between the stacked unit cells for separating the unit cells from one another; and a seal part 10a located in each of the fuel electrode layer and the air electrode layer, uniform with the separator 14 or the solid electrolyte 4 at least in thermal expansion and shrinkage characteristics, integrated with a peripheral part of the fuel electrode or the air electrode, integrated with the adjacent separator and the adjacent solid electrolyte, and including a nonporous part. The stack structure 40 is formed so that fuel gas and air gas to be supplied to the fuel electrode and the air electrode respectively can be circulated therein.

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